Improved double window



UNITED STATES PATENT Ormea.

T. S. LAMBERT, OF PEEKSKILL, NEW YORK.

IMPaovED DOUBLE WINDOW,

Specification forming part of Letters Patent No. 17,837, dated May 23,1865.

To all whom it may concern Beit known that I, T. SLAMBERT, of Peekskill,Westchester county, New York State,4

have invented anew and useful Improvement in Double Windows; and I dohereby declare that the following is a full and exact descriptionthereof, reference being had to the accompanying drawings, and to theletters of reference marked thereon. u

The nature of my invention consists in providing an inside double windowcomposed of an upper and lower sash, sliding in the. stops of the outerwindow, made to press against the sash by a strip of paper, cloth,rubber, or other material, that holds the sash in place, therefore, andobstruets the passage of air, serving also to sustain the sashes whenraised or lowered, the front of the stop being also furnished with amolding or strip, applied so as to cover the material behind the stop.The whole has a finished appearance, and is a lighter, neater, moreperfect, and cheaper sliding double window than any heretofore invented.

To enable others skilled in the art to make and use my invention, I willdescribe its con' struction and operation.

Figure l represents an inside view of the double window, the upper' sashlowered and the lower one raised. Fig. 2 represents-a sec tion of theinner and outer window and the frame at one side, indicated by thedotted black line, Fig. l.

The same letters indicate in each gure` corresponding parts.

A represents in Fig. l the inner edge of the frame of a window to whichthe inner casing of it is attached, and against which the stop F, Fig.2, is placed unless separated by K, (shown by the dotted red line inFig. l, and by red also in Fig. 2,) which material (represented by K) isinterplaced between the frame and stop to obstruct the passage of airand to canse pressure against thesashes Gr and H.

' x and y, Fig. 2,represent grooves in the stop F, fitted, as may bereadily seen, by corre spending tongues of the sashes G and H.

I represents a strip or thin molding applied to the front edge of thestop F. In Fig. 2 itmay be seen overlapping the front edge of the frameA, and also the inner surface of the sash II, thus covering the joint ofthe sash with the stop and hiding the material K and covering its jointswith the frame on the one hand and the stop on the other.

E represents the lower sash of the outer window.

`D represents a stop under the upper outer sash.

U represents the outer stop of upper sash, and B represents the outercasing of the frame.

L L represent the upper and lower stops, reaehin g over and under theinner sashes back to theouter sash.

The material represented by K may be merely interplaced, `but it is moreconvenient to have it fastened to the frame. The stops then beingapplied to each side of the sashes, they may be pressed into theirproprr position, and will be held usually without any further fastening;or a single screw may be inserted through each stop about midway of thelower sash. When spring comes and the double windows are removed, thestopsmay be replaced, or, what will appear better, they can be insertedor exchanged from side to side, and thus the grooved surfaces turned inand the smooth side out. Thus but one set of stops will be required forsummer and wil ter use. The stops may be deeper Athan the frame withoutobjection, as the moldin g I will hide the otherwise defect, or if thestops do not extend to the front edge of the frame A the molding I canbe made to abut against the frame A.

The sashes for such an inner window may be with propriety made ofthreefourths of an inch thick lumber, or even five-eighths stuff willanswer. The sash will therefore be light, easily held lby the action' ofthe material K, without weights, springs, or other fastenings.

Vhat I claim as my invention, and desire to secure by Letters Patent,is-

1. The combination of the convertible stop F and its molding I and thesashes Gr and H, with the frame A, in the manner and for the purposesubstantially as set forth.

2. The combination of the material K with the stop F, the molding I, thesashes Gr and H, and the frame A, in the manner and for the purposesubstantially as set forth.

T. S. LAMBERT.

